* plugins will not get deleted when a filer asset gets deleted
* shouldn't get errors when folder plugin remains orphan
Merge pull request #26 from pbs/LUN-1166

* plugins will not get deleted when a filer asset gets deleted
LUN-1192 : Remove all default margins for any context
Merge pull request #27 from pbs/LUN-1192

LUN-1192 : Remove all default margins for any context
As a result of changes to LUN-1192, integrated in master, backport those changes for support branch
Merge remote-tracking branch 'origin/master_pbs' into support/0.9.4pbs5.x